Mark Sanford advances to runoff in South Carolina GOP House race

Former South Carolina Gov. Mark Sanford has advanced to a runoff in the Republican contest for an open congressional seat along the state’s south coast.

Meanwhile, the sister of comedian Stephen Colbert has won the Democratic primary for the seat. Elizabeth Colbert Busch on Tuesday handily defeated perennial candidate Ben Frasier and will face the winner of the crowded GOP primary in the May 7 general election.

Tuesday was Sanford’s first political race since disappearing while governor in 2009 and then returning to admit an affair with an Argentine woman. They are now engaged.